Interlocking container and cover arrangement

Claim 1

A LEAK-PROOF, SELF-SEALING, INTER-LOCKING CONTAINERCOVER ARRANGEMENT FOR A MULTI-SIDED CONTAINER AND COVER FORMED OF A FLEXIBLE MATERIAL: COMPRISING AN OPEN-TOP CONTAINER MEMBER HAVING A BOTTOM WALL AND A PLURALITY OF SIDE WALLS UPSTANDING THEREFROM PRESENTING AT THEIR UPPER EDGES A CONTINUOUS PERIPHERAL LIP, EACH OF SAID SIDE WALLS HAVING A PAIR OF SPACED INNER AND OUTER SURFACES, SAID LIP BEING FORMED INTEGRALLY WITH THE UPPER EXTREMITY OF EACH SIDE WALL AND BEING GENERALLY SEMI-CYLINDRICAL IN VERTICAL CROSS SECTION AND PRESENTING A FLAT DOWNWARDLY FACING SEALING SURFACE EXTENDING HORIZONTALLY OUTWARD FROM THE UPPER EXTREMITY OF THE SIDE WALL OUTER SURFACE AND PRESENTING AN ARCUATE UPWARDLY FACING CAM SURFACE EXTENDING FROM THE UPPER EXTREMITY OF THE SIDE WALL INNER SURFACE TO THE OUTER EXTREMITY OF SAID SEALING SURFACE; AND A GENERALLY FLAT COVER MEMBER HAVING A CENTER PLATE WITH AN INTEGRALLY FORMED PERIPHERAL RIM ADAPTED TO SEAT ON SAID CONTAINER MEMBER LIP IN INTERLOCKING ENGAGEMENT THEREWITH, SAID RIM INCLUDING A PAIR OF PARALLEL INNER AND OUTER VERTICAL WALLS SPACED FROM EACH OTHER AND INTERCONNECTED AT THEIR UPPER EDGES BY A HORIZONTAL TOP WALL, SAID OUTER WALL HAVING ADJACENT ITS LOWER EXTREMITY A SHELF EXTENDING TOWARD SAID INNER WALL PRESENTING A GENERALLY FLAT UPWARDLY FACING SEALING SURFACE SPACED FROM SAID TOP WALL TO DEFINE WITH SAID TOP WALL AND AN UPPER PORTION OF SAID OUTER WALL A LIP RECEIVING GROOVE AND PRESENTING AN INWARDLY FACING CAM SURFACE SLOPING INWARDLY AND UPWARDLY TO THE INNER EXTREMITY OF SAID RIM SEALING SURFACE; SAID LIP CAM SURFACE BEING ADAPTED TO RIDE UP SAID RIM CAM SURFACE, AS THE COVER IS URGED DOWNWARDLY ONTO THE CONTAINER, AND FLEX ONE OF SAID MEMBERS RELATIVE TO THE OTHER MEMBER UNTIL SAID LIP IS RECEIVED WITHIN SAID GROOVE WITH THE RESPECTIVE SEALING SURFACES IN FULL FACE ABUTTING ENGAGEMENT WITH EACH OTHER.